Citation:

PANGAEA.895350

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Abstract:

Multibeam echosounder (MBES) data recorded during RV METEOR cruise M134/1 between 16.01.2017 and 18.02.2017 around South Georgia. The main objective of was to investigate emissions of free gas from cross‐shelf troughs of South Georgia, their distribution, quantification, and sources for methane ebullition sites in sub‐Antarctic waters. Another objective was the mapping of the glacial bathymetry on the shelf. CI Citation: Paul Wintersteller (seafloor-imaging@marum.de) as responsible party for bathymetry raw data ingest and approval.

Description of the data source:

During the cruise RV METEOR M134/1 the hull-mounted Kongsberg EM122 with a nominal sonar frequency of 12 kHz was utilized. The EM122 system is a deep‐water multibeam echosounder providing accurate bathymetric mapping down to full ocean depth. 288 beams with an acoustical footprint of 1°(TX)/2°(RX) are formed for each ping. For further information consult https://www.km.kongsberg.com/. During this cruise the swath width was set to 130° and the high-density equidistant and the dual-swath mode of the EM122 was used, resulting in up to 864 soundings per ping. The survey speed was kept between 6-10 knots depending on weather conditions and flare surveying. The main purposes of most of the surveys were mapping for bathymetry and searching for gas flares in the water column. Since the EM710 was recording almost continuously, the EM122 was mainly used for transits, in water depth deeper than 500 m or for short dedicated surveys in order to achieve better backscatter information. Responsible person during this cruise / PI: Wilhelm Weinrebe (wweinrebe@geomar.de) & Paul Wintersteller (pwintersteller@marum.de).

Chief Scientist: G. Bohrmann (gbohrmann@marum.de)

CR: https://elib.suub.uni-bremen.de/edocs/00106081-1.pdf

CSR: http://www.bsh.de/aktdat/dod/fahrtergebnis/2017/20170002.htm

A special thanks goes to the watch keeper during M134/1: Viola Bihler, Maximilian Grahs, Miriam Römer and Nikolas Stange.

Further details:

Bohrmann, Gerhard; Aromokeye, Adeyemi David; Bihler, Viola; Dehning, Klaus; Dohrmann, Ingrid; Gentz, Torben; Grahs, M; Hogg, O; Hüttich, Daniel; Kasten, Sabine; Kirschenmann, E; Lange, Mirko; Leymann, Tom; Linse, Katrin; Loher, Markus; Malnati, Janice; Mau, Susan; Mickoleit, Anett; Nowald, Nicolas; Pape, Thomas; Reuter, Christian; Römer, Miriam; Sahling, Heiko; Stange, Nikolas; Torres, Marta E; Vittori, Vincent; von Dobeneck, Tilo; von Neuhoff, Holger; Weinrebe, Reimer Wilhelm; Wintersteller, Paul (2017): R/V METEOR Cruise Report M134, Emissions of Free Gas from Cross-Shelf Troughs of South Georgia: Distribution, Quantification, and Sources for Methane Ebullition Sites in Sub-Antarctic Waters, Port Stanley (Falkland Islands) - Punta Arenas (Chile), 16 January - 18 February 2017. Berichte aus dem MARUM und dem Fachbereich Geowissenschaften der Universität Bremen, 317, 220 pp, urn:nbn:de:gbv:46-00106081-12

Coverage:

Median Latitude: -52.448610 * Median Longitude: -64.413885 * South-bound Latitude: -53.197220 * West-bound Longitude: -71.011110 * North-bound Latitude: -51.700000 * East-bound Longitude: -57.816660

Event(s):

M134/1-track * Latitude Start: -51.700000 * Longitude Start: -57.816660 * Latitude End: -53.197220 * Longitude End: -71.011110 * Campaign: * Basis: * Method/Device: Underway cruise track measurements (CT)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator
1	File name	File name		Wintersteller, Paul
2	File format	File format		Wintersteller, Paul
3	File size	File size	kByte	Wintersteller, Paul
4	Uniform resource locator/link to file	URL file		Wintersteller, Paul

License:

Licensing unknown: Please contact principal investigator/authors to gain access and request licensing terms (UNKNOWN)

Status:

Curation Level: Basic curation (CurationLevelB) * Processing Level: PANGAEA data processing level 1 (ProcLevel1)

Size:

4080 data points

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